Fatal error: Uncaught Error: Class "MediaWikiIntegrationTestCase" not found in /var/www/html/orian-wiki/extensions/VisualEditor/tests/phpunit/integration/DualParsoidClientTest.php:21
Stack trace:
#0 {main}
thrown in /var/www/html/orian-wiki/extensions/VisualEditor/tests/phpunit/integration/DualParsoidClientTest.php on line 21